The document specifies a method for the measurement of the electrical conductivity of all types of water. The completeness of analysis for ionic constituents can be checked using this method.
DIN EN 27888:1993 history
1993DIN EN 27888:1993-11 Water quality; determination of electrical conductivity (ISO 7888:1985); German version EN 27888:1993
1993DIN EN 27888:1993 Water quality; determination of electrical conductivity (ISO 7888:1985); German version EN 27888:1993